Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7294d4da762e44b…

MALICIOUS

PDF

75.1 KB Created: 2021-03-23 12:04:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c00a13a21e0d0797b9b3bae8b3017134 SHA-1: 283d06c743086d4fab6652927a0e1a9550baf420 SHA-256: c7294d4da762e44bfb1cf790f31608944433727d59e031e1876590c45d9e037f
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV and ML classifiers identified this PDF as malicious, specifically flagging it as a phishing trojan. The embedded URLs likely serve as a distribution mechanism for further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jumiwimov.ru/award?keyword=cctv+technician+job+description+pdf PDF link annotation
    • http://nasporte1.fun/cisco_wireless_access_point_configuration_guidecbbnk.pdfIn PDF document text
    • http://italywom.space/kovozabezenozepebimi7fc26.pdfIn PDF document text
    • http://nurokojo.mypressonline.com/wedogadibilokoduwirinop.pdfIn PDF document text
    • http://twoup-viktoria.online/banokusigigenukipezutar31nb6.pdfIn PDF document text
    • http://verenica.net/1st_rank_raju_full_movie_mp4rhyqd.pdfIn PDF document text
    • http://cherrypimp.online/debimugav20gm.pdfIn PDF document text
    • https://vejamepune.weebly.com/uploads/1/3/0/7/130776484/8145551.pdfIn PDF document text
    • https://woraragupawajup.weebly.com/uploads/1/3/2/6/132681931/pisepeji-vavukadenojak-wezebazovajip.pdfIn PDF document text
    • http://cg-designer.xyz/where_is_the_battery_for_a_2005_chevy_equinox4zt4g.pdfIn PDF document text
    • https://xozilawowoxov.weebly.com/uploads/1/3/4/7/134704750/1d09b8a61.pdfIn PDF document text
    • https://japiravonasuv.weebly.com/uploads/1/3/4/6/134644749/jiravanelotuwasimi.pdfIn PDF document text
    • http://goossyy.online/64841302072n1b56.pdfIn PDF document text
    • https://jofukesor.weebly.com/uploads/1/3/3/9/133999831/wekarunib-dadisewadikixu-lobebamuguv.pdfIn PDF document text
    • https://dubobovutorikug.weebly.com/uploads/1/3/5/3/135332124/xutumobikeba_dizamate_nozilusogilogi.pdfIn PDF document text
    • https://revijokatise.weebly.com/uploads/1/3/3/9/133999222/pegenivuwujisuzeregu.pdfIn PDF document text
    • http://delinapod.mypressonline.com/how_do_i_unlock_my_thermostat_screen.pdfIn PDF document text
    • https://pugiputofal.weebly.com/uploads/1/3/4/7/134740318/9539340.pdfIn PDF document text
    • http://ruvenebigolusep.mywebcommunity.org/sindrome_de_banda_iliotibial.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff75219b-cae8-4de8-b19b-4f087cbd934a/neato_botvac_d80_hard_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4338a26-9e92-4ce7-8a5b-0cb20ada6f87/pretty_little_liars_season_ranked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8415c3e7-a297-4880-92df-a9d531695d52/how_do_i_apply_for_religious_exemption_for_vaccines.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E2 5392 bytes
SHA-256: d98f00865df3e40242606eabc21765e5896c201d303ab06251ed5fd83c8962de
font_01_sfnt_off0000f930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF930 11548 bytes
SHA-256: da30e2d92b0e81c7d6d870daae26517b83a239c71d7f97dabf2132ce8dc29dda